Another interesting phenomenon observed to-day was a cirrus cloud lit by sunlight.

A high sheet of cirrus cloud was not going to offer any respite from the blurred sun.

Filling the vision to the south-west was Aurora Peak, in crisp silhouette against a glorious radiant of cirrus cloud.

His close attention to the news was based on what, realistically, was probably a hope as thin as a cirrus cloud.

Mount Engelstad lay in shadow, but on its summit rested a beautiful light little cirrus cloud, red with an edge of gold.

A blue sky with fluffy white cirrus clouds stretched in every direction.

Bars of cirrus clouds covered the whole sky-thepresage of a coming storm.

He looked up and saw the blue sky above fretted with cirrus clouds.

The moon was just overhead, ringed round with a field of cirrus clouds.

They must be cruising somewhere up above those thin cirrus clouds.

Cirrus clouds form high in the atmosphere, and are made from particles of ice.

Slender sheaves of cirrus clouds were followed on the horizon by layers of nimbocumulus.

When long cirrus clouds or "cow's tails" are seen, it means rain.

These clouds are made of water ice-just like ice-crystal cirrus clouds here on Earth.

Another would thin cirrus clouds, which unlike other types absorb more heat than they reflect.

Their targets would be cirrus clouds, those wispy strokes of white common on pleasant days.